8890991 has 4 divisors (see below), whose sum is σ = 8918184. Its totient is φ = 8863800.

The previous prime is 8890969. The next prime is 8890997. The reversal of 8890991 is 1990988.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8890991 - 2¹⁸ = 8628847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8890997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13100 + ... + 13761.

It is an arithmetic number, because the mean of its divisors is an integer number (2229546).

Almost surely, 2^8890991 is an apocalyptic number.

8890991 is a deficient number, since it is larger than the sum of its proper divisors (27193).

8890991 is a wasteful number, since it uses less digits than its factorization.

8890991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27192.

The product of its (nonzero) digits is 46656, while the sum is 44.

The square root of 8890991 is about 2981.7764839102. The cubic root of 8890991 is about 207.1651618131.

The spelling of 8890991 in words is "eight million, eight hundred ninety thousand, nine hundred ninety-one".